The main goal of this extension is to utilize documentation, default options and many other things created
with a source code, but usually not presented in a convenient form for day-to-day operations. For example,
when need to configure a newly added extension and switch between its source code and Yii config for proper
setup. App Manager eliminates such cases by providing abilities to configure and see useful comments in one place.
Also it decreases possibility of misconfiguration by providing some basic validation rules.

Not the last goal of actual extension is to show all available for configuration properties. Lots of them
usually hidden deeply inside sources (or by inheritance tree) and can be hardly recognizable.

checked out the demo, looks great!
I am a bit concerned about the risks of being able to manipulate the configuration data like this, but in the right hands and with the correct permissions it should be ok.
I'll report back once I get a chance to use it on a project . Thumbs Up!